Bowing is a sign of reverence - respect for God. Therefore, we bow every time we pass in front of the altar, which is consecrated to God and is a sign of Jesus. We also bow before receiving Jesus in communion.
Catholics believe Christ is present there. Actually you should kneel in reverence if no one is at the altar.
Bowing to the altar, consecrated by a Bishop, acknowledges that Jesus is made present there; if a non Catholic attends the service he can bow as a sign of respect but does not have to if uncomfortable.
It is a cloth placed on an altar.
It is customary to reverence the altar (which means while facing the altar, stand "at attention", and then make a slight bow of the head) when a Catholic visiting the inside of a Catholic church passes an altar where Holy Mass has been celebrated, but where the Blessed Sacrament is not presently reserved. (When passing an altar or a tabernacle where the Blessed Sacrament is reserved, Catholics customarily genuflect instead.)
A dedicated Catholic Church has an altar and both the altar and the Church itself have been solemnly consecrated with a lot of Sacred Chrism and incense by a Bishop. There will be a signed declaration somewhere that says that the Bishop has consecrated the Church and when.
the Sanctuary
Roman Catholic AnswerThe altar (and the priest when he is at the altar) are contained in the sanctuary of the Church.
The sanctuary is the part of the church which contains the altar.
An altar bell is a bell rung in the Roman Catholic church at significant times during the Mass.
Roman Catholic AnswerYes, if you have made your first Holy Communion and want to be an altar boy, you speak to the priest and ask him. He will talk to you and arrange for you to be trained.
It is the table at the front of the church, usually made of wood or marble. It is where the Eucharist is celebrated.
White! The color of Joy!
.Catholic AnswerNormally stone, at least the actual part of the altar that the sacrifice is celebrated on would be stone. There is often an "altar stone" inserted in the top of a wooden altar.